<http://schema.org/description>
"\u4ECA\u9031\u306E\u30EC\u30B7\u30D4\u306FTwitter\u30AF\u30E9\u30A4\u30A2\u30F3\u30C8\u3068\u3057\u3066\uFF0Ctwittering-mode\u3092\u7D39\u4ECB\u307E\u3059\u3002"^^<http://www.w3.org/2001/XMLSchema#string>
<http://gihyo.jp/admin/serial/01/ubuntu-recipe/0187>